Here is a Web site by a guy who designed working versions of all the basic logic gates, that is the NOT, OR, NOR, AND, and NAND gates, with Lego blocks.
A collection of mechanical musical instruments, music boxes, and automata has recently been awarded to the Morris Museum in New Jersey, which is showing 60 of the pieces on its Web site.
Bird Precision offers an online conversion reference for parameters that include acceleration, angles, computers and electronics, density, energy, finance, force, distance, light, numbers, power, pressure, speed, temperature, torque, viscosity, and weight to name a few.
On the Minco Web site, engineers can watch Webcasts, enter a discussion forum, read or post engineering questions, query experts, and download whitepapers.
A CAD configurator and Webordering system lets users survey some 200,000 mechanical and motion-control parts, then parametrically configure them into native CAD files that can be downloaded for use in engineering models.
The iKnow training page of Banner Engineering offers tutorials in four major categories: photoelectrics, vision sensors, machine safety, and measurement and inspection.
Cognex offers a wide-range of vision tools for object location, defect inspection, gauging, and part identification, as well as a variety of specialized functions.